Tag Archives: optimization

Self-organization Based Control

Self-organization Based Control For New Generation Networks

PI: Douglas Sicker, Department of Computer Science, University of Colorado at Boulder

Self-Organization (SO) of network components and operating parameters offers promising ways to achieve higher scalability, robustness, and adaptability in future generation networks. In a self-organizing based network architecture, the globally integrated behavior of the whole system emerges through mutual interaction among networks and nodes operating on local information. As guiding principles of self-organization, networking researchers have adapted models and algorithms of self-organization found in mathematics, chemistry, physics and biology. There is a growing body of literature on this topic, particularly relating to biologically inspired algorithms (BIA); however, there is little work that compares these algorithms against established approaches or against the overall complexity of network control, and there is an absence of work that describes the classes of algorithms as they relate to various network challenges.

This work proposes to examine this area by considering a general design methodology of BIA-based control to answer such questions as: What kind of BIA can be applied to which network control problems? How well do these algorithms and problems conform to the notion of distributed or local control? How well can we expect these algorithms to operate – both in terms of solving the given problem and in terms of computational overhead? How do these algorithms perform when implemented in actual wireless networks. The fundamental goal of this work is to provide a rigorous structure for assessing the general applicability of BIA for wireless network control problems. An additional goal is to provide a structure for reproducing the experiments by other researchers.

Directional and Phased Array Networks

Directional and Steerable Antennas for Optimizing Networks

PIs: Douglas Sicker and Dirk Grunwald

Directional Antennas emphasize gain in some directions and de-emphasize it in others. Steerable and phased array antennas allow these patterns to be changed in real-time.

As the demand for wireless networks grows, the research community continues to seekmethods for improving network performance. On method for improving network throughput involves using directional antennas to increase signal gain and/or decrease interference. Our work in this area focuses on real-world development and evaluation of directional and phased array antenna systems. To this end, we have built the first large-scale testbed of outdoor phased array antennas, suggested new models for directional antenna use in simulations based on measurements, and have proposed new protocols that optimize their behavior in both time and space.

Selected Publications

The CU WART testbed is the first wide area testbed of functional phased array antennas

  • Eric Anderson, Caleb Phillips, Douglas Sicker, and Dirk Grunwald. Signal Quality Pricing: Decomposition for Spectrum Scheduling and System Configuration. IEEE Dynamic Spectrum Access Networks 2011 (DySPAN 2011). Aachen, Germany. May 3-6, 2011.
  • Eric Anderson, Caleb Phillips, Douglas Sicker, and Dirk Grunwald. Modeling Environmental Effects on Directionality. Mathematical and Computer Modeling Journal. Special Issue on Modeling and Simulation of Wireless Networks. June, 2010. Elsevier.
  • Eric Anderson, Caleb Phillips, Douglas Sicker, and Dirk Grunwald. Challenges in Deploying Steerable Wireless Testbeds. TridentCom 2010. Berlin, Germany. May 18-20, 2010.
  • Gary Yee, Caleb Phillips, Douglas Sicker, and Dirk Grunwald. Wireless Networking Optimizations for Studying Algorithm Interactions. University of Colorado at Boulder, Tech. Report. CU-CS-1070-10. 2010.
  • Eric Anderson, Caleb Phillips, Douglas Sicker, and Dirk Grunwald. Modeling Environmental Effects on Directionality in Wireless Networks. 5th International workshop on Wireless Network Measurements (WiNMee 2009). Seoul, Korea. June 26, 2009.
  • Michael Buettner, Eric Anderson, Gary Yee, Dola Saha, Doug Sicker, Dirk Grunwald – A Phased Array Antenna Testbed for Evaluating Directionality in Wireless Networks. MobiEval ’07 , San Juan, Puerto Rico, USA, June, 2007.
  • Neufeld, M., Grunwald, D. – Using phase array antennas with the 802.11 MAC protocol. Broadband Networks, 2004. BroadNets 2004. Proceedings. First International Conference on pp. 733-735, 25-29 Oct. 2004

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